Photosynthesis and respiration do not happen simultaneously in plants during _____.

early morning

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night

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noon

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evening

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Solution

The correct option is B
night

Plants perform photosynthesis only in the presence of sunlight, i.e, during day. Respiration is a metabolic process which occurs throughout the day. So respiration and photosynthesis both occur during the day, but only respiration occurs at night.

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Similar questions

Photosynthesis and respiration do not happen simultaneously in plants during _____.

(i) In plants, respiration happens during the night time only, while photosynthesis happens during the day.

(ii) In humans, the exchange of gases takes place in the alveoli.

(iii) Haemoglobin has a greater affinity for oxygen than carbon dioxide.

(iv) Aquatic organisms use the oxygen in the surrounding atmosphere for respiration.

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